Smith



(No Model.) 2 Sheets-Sheet 2.

N. 0. GOLDSMITH.

SWITCH STAND.

No. 408,174. Patented JulyBO, 1889.

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N. PEJ'ERs, Photo-Lithographer. Wuhinmon. D. (Iv

IINITE STATES arnNr FFIQEQ NATHANIEL O. GOLDSMITH, OF CINCINNATI, OHIO, ASSIGI OR TO THE IVEIR FROG COMPANY, OF SAME PLACE.

SWITCH-STAND.

SPECIFICATION forming part of Letters Patent No. 408,174, dated July 30, 1889.

Application filed March 30, 1889. Serial No. 305,414. (No model.)

To all whont it may concern:

Be it known that I, NATHANIEL 0. GOLD- SMITH, a citizen of the United States, and a resident of Cincinnati,in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Automatic Switch-Stands, of which the following is a specification.

My invention switch-stand.

The object of my invention is to provide a strong, durable, and positive]y-working auto matic switch-stand, all of which will be fully set forth in the description of the accompanying drawings, making a part of this specification, in which Figure 1 is a central vertical section of my improved switch-stand. Fig. 2 is a sectional elevation of the top, showing the stand locked.

Fig. 3 is an elevation of the switch-stand with the lower portion of the stand broken off to show the position of the parts when in position for being thrown. Fig. 4 is a top plan View of the stand with the target-shaft in section. Fig. 5 is a section on line 5cm, Fig. 1; and Fig. 6 is a section on line y 1 Fig.

1 represents the crank; 2, the crank-rod, which passes up through the stand, and to 50 which the crank 3 is attached. The crankrod is shown round at 4 and 5 for journaling in the bottom and top of the stand. The bottom section of the stand 6 is on its top face provided with annular clutch 7. It has four clutch-teeth in the annulus round the central shaft. The lower section is secured to the upper or the barrel portion of the switch-stand by bolts A. This upper portion is hollow, so as to employ a coil-spring 8, the lower end of which seats upon the hub or lug 9 and the upper end against the disk 10,

which is secured to the crank-shaft by the pin 11. The central portion of the crankshaft is inade square and slides freely through the upper clutch 7, as will behereinafter explained.

The clutch 9 on the crankshaft is provided with teeth engaging with those of clutch 7. In Fig. 3 the crank-rod 2 is shown raised, so

that the teeth of clutch 7 are disengaged from the teeth of clutch 9, which allows the crankshaft to turn for throwing the switch.

relates to an automatic 14. represents a lug on the forward end of the lever 12. As the lever 12 is raised, the said lug 1i strikes against the immovable table 15 on the top of the stand, raising the crank.- shaft 2 up centrally, when said lever is brought into the position shown in Fig. 3, and thereby disengaging the clutches, after which the crank-shaft 2 may be turned in either direction by the lever.

In order to prevent the lever 12 from being dropped until the crankshaft is turned far enough to either fully open or close the I switches, I provide a segmental guide 10, which is mounted upon the table 15. As soon as the lever is turned to move the switch, the lug 14 comes opposite said guard, Fig. 3, and the lever cannot be depressed until it is brought round, say, to the position shown in Fig. 4, when the lever may be dropped into position shown in Fig. 2, the switch being either opened or closed. It can be locked in this position by the hasp of a lock passing through the orifice 18. (See Fig. 2.)

It will be seen that the lever raises the crankshaft 2 freely up far enough to disengage the teeth-clutehes 7 and 9. This movement has no effect upon the spring, as it is lifted bodily with the shaft, the pin between the clutches lifting the upper clutch and spring. Stops 20 and 21 are provided upon each side of the clutch and base of the stand, Fig. 5, to limit the turning of the crankshaft. When the lever is down, as shown in Fig. 2, the lug 1f) prevents it and the crankshaft from being raised. Consequently when the pressure is applied by the train-wheels to the crank-shaft to turn it automatically this imparts pressure to the inclined teeth of the clutches 7 and 9, the clutch 9 sliding upon the shaft 2 and compressing the spring 8 sufficientto allow the teeth of clutch 9 to pass the teeth of clutch 7. It will thus be seen that by means of the lever 12 the switch is locked, except against the great strain of the train, and yet when raised in horizontal posit-ion the switch can be turned freely without being turned against the strain of the spring. This is accomplished by securing one clutch to the switch-stand and one to the crankshaft, allowing the latter to slide freely in the stand, except when it is locked against such movement.

Having described my invention, what I claim is 1. The combination of a sectional switchstand the lower part of which is provided with a stationary toothed clutch 7, the vertical1y-movable crank-shaft 2, the toothed clutch 9, adapted to slide vertically upon the crank-shaft, a spring 8, movable bodily with the crank-shaft and compressed by the upward movement of the sliding clutch, and a lever 12,connected with the crank-shaft, substantially as described.

2. The combination of a switch-stand having a stationary t othed clutch, the vertically-movable crank-shaft, the toothed clutch arranged to slide vertically on the crank shaft, and a spring movable bodily with the crank-shaft and located thereupon above the sliding clutch to press the latter in engagement with the stationary clutch, substantially as described. 7

3. The combination of a switch-stand havin g a stationary toothed clutch, the verticallymovable crank-shaft, the toothed clutch arranged to slide vertically on the crank-shaft, a spring located on and movable bodily with the crank-shaft and acting to press the sliding clutch in engagement with the stationary clutch, and a vertically-swinging lever which in its vertical movement acts on the switchstand to raise the crank-shaft and spring, substantially as described.

4. In combination with the switch-stand, the clutch 7, attached to the stand, the clutch 9, attached to the crank-shaft, the compressingspring 8, the crank 3, the lock-lever 12, and the stops 20 and 21, substantially as herein specified.

In testimony whereof I have hereunto set my hand.

NATHANIEL O. GOLDSMITH.

\Vitnesses:

J. WATsoN SIMS, '1. SIMMONS. 

